block
window "ϵǸϻȤ~!Һ?",yes,no
window_no "..Сļһ~!"
window_yes 
if item 900296==1 && itemspace >=1
killitem 900296,1
giveitem 900295,1
else
Endwindow "@n~!Ҳ̫ʵ,ûжҲҵȷ~!"
endif
endwindow "\n\n ,ҵϼ.֪ʲô~!"